Toothbrush



B. SEELIG Sept. 29, 1931.

TOOTHBRUSH Filed Aug. 24, 1928 ATTORNEY Patented Sept. 29, 1931 nnnrm semmai orfxmsaslcxrv', inissoimrA nppneeaeamea,Augustine, 192s'. seriaino. $01.809. i

ter in which a brush yis rection by a plunger which tensions''aspring 5* Jfor operating the brush "in the otherjdirection, the principal objects of the invention being to adjust the le'I-igthfofthepath: over which the plungery reciprocates and'vto vary"- whereby'the rack bar may move reciprocably the speed of the're'tnrnistrokef` Further-objects a eff-tv 'enclose aplungerreturning spring in an' imperforate'fportion' of the brush support,'to latch the springy adjustably to the su "port, and toifacilitate the' mounting of' the spring 'the support; rAn'- 175 other object is to provide ak 'compact' device having relatively :few parts'whioh inay be" easily andV quickly assembled'and readily -adv justed and in which the parts are protected -20 terious'substances.' of the invention, Ithave provided improved details of structuregthe preferred forms ko 30 View ofthe device.'

. Fig. 3 is a detailI perspectiveof the brush and brush-supporting mandrel.

Fig. 4 is a transverse sectional vview on the line V4-4, Fig. 2,1 'illustrating ethe rack 1 and pinion means for operating the brush.

Fig. y5 is a detail persp'ective'viewY of the cap for latching'-theplunger-returning spring to the barrel., .r "-'5- f Fig. 6 is a detail erspective'lviewof the opposite ends of t spring.v ly

Referring in `detail to the drawings: f"

- 1` designates "a' barrelk havingr a reduced upper yend 2 Aandan it'ernaliannular.bearing boss 3, and 4 designatesfashaftjour-s naledin theV reduced endV 2 andfbossx and having anv axiallvbored splitportionextendingbeyond the barrel tofy receive a mandrel 6 having a colla!` t7 in which vthe bristles 501 Spare/mounted, the'fmandrel having aiae from intrusion nof moisture and other dele! In accomplishing these and othervobjects f' prising 'a and through.,` a Lslot 18 extending longitudif nally inthe shaft from the lower end there;

lof to a pointlQ adjacent the ratchet, Where'A whiclrare illustratedin the accompanyingl a' comprising a body'21 andfareduced1 sleeve e plunger returning trunnionI 9A on its lower` enyd-receivableinaf socket 10 of the shaftfor latchingth'eman#-vl drel in the shaft against rotationsv l l l" Rack 'and pinion means-orfactuating the shaft are illustrated as preferably .comprisf ing a pinion 11 fixed to the shaft/'and a rackbar 12 slidablevin a guide 1 3 formed on the barrel f and I' extending Y transversely thereof,

rotatably in one direction',lan'd a spring VE16 isprovided'ffor returning the rackto preoperating position, the springt *preferably comprising a wire formed into l'a coil andV having a radially inturned upper endicom-' latching 'finger 17 -movable into by the'spring may lbe'mounted on the shaft andfmoved therealong for complete enclo'-,v sure by the barrel. A pin is `iixedy in the outer end kof the rackvtostop the samef and reventl the rack' from vescaping from the arrel Vwhen actuatedby the-spring; ,n

Mountedjon' the, lower end of the barrel to retain, the spring'and shaft is acap 42O portion l22 slidable" in the l'lower end of the barrel', the rsleevegbeing Vprovidedwith alongitudinalslot 23 vto receive ira ilongitudi#v nally outbentjlatching end or finger -24 of Y the wire ormingth spring. The sleeve is s'lidabley longitudinally into the barrel over thelowerY end of the 'shaft into engagement with kthe spring, and/when ysomounted 1is friction'ally latched to the barrel to'anchor the spring, but Amay be rotated to vary the 0f' tension'o'f the springff Thejbo'dy memberhas an axial recess 25 toreceive the lovver end of the` shaft which comprises aijournalopening for supporting the shaft, and a transverse opening 26 Ato'. u*

receive means such Vas a rod adapted to overcome the frictional resista-nce of the barrelengaged sleeve for rotating the cap to vary the tension of the spring. The shoulder 27 formed by the reduction of the cap member to provide the sleeve, seats against the loWer end of ,the barrelwhen the kcap ,is inishaftf engaging position.i

The parts being constructed as described,

the shaft may be insertedk inl thebarrel through the lower open end-thereon'thel pinion engaging the boss and stoppingvthe' shaft in position for engagement of the r'ack bar With the pinion;

ting tightly therein. he lower fof the spring member extends `in spaced nela-y tion Withthejaxis.offthe spring, and-is; slide received i-n V:the slot ofthe'ijs/lewe,A :and the axial recess ofthe capbodylreceivesand .The cap therefore frictienally flat-.ches .the spring to thebarrel. l'WlienthebarrelY is held in; the hand of an foperator, 'movementfof the-E directionftofrotate the-shaft; spring,r zand when tliep-ifack'i is :released 4the/spring will umvindV-.andgrnove ably journals Y the lower end off theshagft,

rackbar "injone will tensionI the the'shaft rotatively in the other dreCtin, for.A rotating the brush and restoring the rackt to' vpreoperating position.

transverse -opening of 'the cap, zforqturninge It is apparent that when'the'parts afrer originally f assembled, the Yraelr-k bar l beingf in completely. retracted position,--tlier'e Willbe:A notension onfthe Fspring lVhen the brush; is used, the en-tire .rack bar-y Will :moves over-r l-arge pjredetermined-Anumberofrotations of the Ashagt be,y tensioned; su'liciently to Sretu-rn At-hei bar to completely, retracted position`,j. the shaft 'being :actuated the pinion', so A`that ya. relatively will. occur and the. spring `'will bythel springevatE relatively.low speed.- r v l 1- ff The cap `may be turned fanti-clockwise in j the illustratedstructure to set up initialftenf; spring 'whereby :"the frackfbarf will berfheld yieldnglyi'n extreme retracted be necessary lto Inove'the bar, -and .thespring ivillr'move,A the" shaft .and barretractivelyfathigher speed.y i The'cap `-inaybe*turned clockwise direction, :for relieving thief-presi? sure lon thefrafck bar, =and-maybeturned suf-f ficie'ntly to rotate theishaft-so'that thefraltchJL sion ofthe position, more `force ,will

Vin the -Qppositeor et'moves the rack bar "a'vvay lfrom completely retracted position, and-"thefbarfvvillfbe fat:

rest the: position shown :in Fig. "1,: 'wherebythe driving stroke ofthelplnnger or frackf bar.r is'redu'ced, land the :springiyvillfretu'rn th@I bar 'to its 'initial position. fr I:

Y forlflatchling.th;3 opposite end of the spring to the barrel, and means including a rack and pinion for rotating the fsli'arft? tension the spring Af o,rrotating the shaft in the opposite direction.

f 42 A:devi:cewoftheI character described in- The coil spring is theninser'tdii the" barrel,` the inbent finger movingfini ,the 'shaft-- slot, A and: the 'cap Vis applied the Sleeve sliding into the-lower endofethe'ibarreland lit-g tudinallyf-ouli-,tlarnet1;;l linger -f on the spring,

an'df-spriiigranehllgIneans 50.11 the barrel having slidablegeigagemgentgwith 'saidlinger, said-f-Ineans-beingq, enable for-adjusting the tensionof'gthespringen; 'f

tedn'irshaft- :journaled supporti; Vmeans for-'ndtatingqthe shatsin ione direction, and

direction, inludingfarspring having. a radii A all :ri-ntu/rned. fi erfslidablelongitudinall YA suitabley tool .maygbe -insertedflinfthe? y ng o y in the slotfoffthe fshaftsandl :a longitudinally out-turned vfinger engageable L, with vvthe L support. f

14. @Ariotary tooth: brush comprising a barrel, a shlfthavi'iigia longitudinal slot, a coil spring'liavingf aw :fngeronbm end` adapted to move in the slot for mounting-the'spring on'tlief-sha-ft tolle-tchathe spring tothe shaft, means' including. ascap frictionally engaged with the barrel for adjustablylatching the' opposite'ed `ofith'e,:spring tothe barrel, and means for rotating the shaft infame-'direction to tension` the 's' in the .opposite directional: v

v'5; rotaryftoothibrushvcomprising a bariiel',l a VbrushsupportingV shaft l oirnaled f in the barrely'nieairs'fifor `rotating the shaft in one Hirectiomfa'ndimeansfffor rotating the shaft. finf the; r.oth'er "fdirecti'n Y@including `a spring having a radially. intuir-,ned linger engageble with the ."fshaft, a :longitudinally outturned n'gerion its'opposit'e end, and a cap having a vsleeve slidable in the barrel having 'ia' slot" to .re'ce'ive said 'i vout-fturi'ied fingery of I.the fsprngl' 'for -slidably inounting thefcap `inf'vt'he: barrel:-

slifdable engagement withfithiespring: V fi 6:.: In -adevic'e "ofth'e "character described.

t1on,m'eans -f'forfrotating Ethe' shaft in the s otherf directiIfnCluding af coil" spring,

, described in I cludllng fra' lsupporft, ra huish-.supporting slot-` priirg ffor 'rotating :the .shaft iso means 4for engaging one end of the spring with the shaft, and means for anchoring the c opposite end of the spring to the barrel including a cap frictionally engageable with' the barrel and provided with an axial recess to receive the outer end of the shaft for centering the shaft and having a slot offset laterally from the recess to receive said opposite end of the spring for removably engaging the .cap with the sprin l y In testimony Whereo I aii'x my signature.

v BERTHAK'SEELIG. l 

